Chemistry

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Across
  1. 3. Aristotle's theory of Air, water, fire and earth
  2. 6. what is "Ag" on the Periodic Table?
  3. 7. energy stored in the chemical bonds of substance
Down
  1. 1. heat given off products feel HOT
  2. 2. extremely unreactive; examples: neon, argon, helium
  3. 4. good at conducting heat and electricity
  4. 5. natural materials that do not produce heat or electricity;most are gases